Idle Compensator Test; Altitude Compensator Test - Mazda 1983 RX7 Service Manual

diaphragm (throttle opener) and connecting hoses and wires. The
throttle opener opens the primary throttle valve when air conditioner
is operated at engine speeds of 1000-1200 RPM to maintain smooth
engine operation.

IDLE COMPENSATOR TEST

Remove air cleaner cover and filter element. When bi-metal
temperature is below 149
leakage should exist when vacuum is applied to tube. Bi-metal valve
should be open when temperature exceeds 159
not function as described, replace valve.

ALTITUDE COMPENSATOR TEST

NOTE: Altitude compensator can only be checked at altitudes of
1640-4920 ft. (500-1500 m).
1) Remove air cleaner and start engine. Engine should idle
smoothly. Place finger over slow port inside carburetor bore (located
on right side of rear bore). With slow port covered, idle speed should
drop.
2) If idle speed does not drop, stop engine and remove
compensator valve. With compensator valve removed, blow through
drilled passages.
3) Air should pass through valve from both passages at
altitudes of 1640-4920 ft. (500-1500 m). If not, replace altitude
compensator valve.
Fig. 2: Altitude Compensator
IDLE COMPENSATION SYSTEM
Article Text (p. 2)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:59PM
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F (65 C), valve should be closed and no air
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F (69 C). If valve does